Fibre board, a method for making it, and a binder composition

Details Fibre board, a method for making it, and a binder composition Fibre board, a method for making it, and a binder composition

B - Operations, Transporting

27

N

6/226, 9/65

B27N 9/00 (2006.01) C08L 97/02 (2006.01) C09J 1/02 (2006.01)

Patent

CA 1247807

ABSTRACT Fibre boards of high strength which are highly water- and flame-resistant are disclosed, as well as a method for making such boards, and an inorganic binder composition for bonding wood fibres. The boards comprise a lignin-containing fibre material, a binder derived from a binder composition comprising an alkali silicate solution, sulphur and/or an inorganic sulphur compound, and a calcium and/or magnesium compound and, optionally, fillers and/or hydrophobing agents. The fibre boards are manufactured by mixing the lignin-containing fibre material with the binder composi- tion and optional further additives, whereupon the mix is compressed at a high pressure and at a temperature of 130-230°C.

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